One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,4,8)(9,10)(11,15)(12,14)(13,16)(17,18,23,21)(19,26,29,25)(20,22,32,24)(27,30,31,28)(2,6)(7,8)(11,16)(13,15)(17,19)(18,25)(20,31)(21,26)(22,30)(23,29)(24,28)(27,32) involution — undirected(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,13,14,15)(17,20,23,32)(18,24,21,22)(19,27,29,31)(25,30,26,28)(10,14)(13,15)(17,21,23,18)(19,27,29,31)(20,22,32,24)(25,28,26,30)(1,4,5,3)(2,7,6,8)(17,22,23,24)(18,20,21,32)(19,28,29,30)(25,27,26,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.